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Chemistry of living things
Chemistry of living things
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A biology quiz focusing on the basics of chemistry for living things
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
An _________ is a biological catalyst that speeds reactions with substrates
buffer
end product
enzyme
catalyst
2
Which coefficient would balance the chemical equation above?
2 coefficient in front of the O2 on the reactants
2 subscript on Fe and 3 coefficient on O2 on the reactants
2 coefficient on Fe, 3 on O2 reactants and 2 on the product
2 coefficient in front of Fe on the products
3
In the graph above, adding an enzyme:
Makes it harder for the reaction to happen
Decreases the amount of energy needed in the reaction
Increases the amount of energy needed in the reaction
Doesn't change the energy
4
What are the reactants?
H and O
H2O2
H2 and O2
H2 and H2O
5
Atoms in a reaction must be balanced according to:
The law of conservation of mass
Ms. Slatton's rules
The law of thermodynamics
The law of chaos
6
There are enzymes in saliva that start to break down food
False
True
7
Acids are measured on the pH scale from 0-7. Orange juice has a pH of
6.4
3.6
8
1
8
A(n) ___________ is a substance that lowers activation energy (makes it happen faster)
Active Site
Acid
Buffer
Catalyst
9
What is the smallest particle of matter?
neutrons
atoms
nucleus
cells
10
Is the equation above balanced?
No
Yes
11
A buffer is something that
speeds up a reaction
slows down the streaming of videos
only reacts with bases
slows down a reaction
12
Apples, avocados, and potatoes brown in the presence of oxygen because of:
A buffer
The enzyme polyphenol oxidase
The enzymes in saliva
that's just what they do
13
A _______ is a substance that needs a biological catalyst to help it react
substrate
reactant
product
enzyme
14
Atoms form compounds during a :
Chemical reaction
Physical change
Bond
catalyst
15
Atoms bond to be stable. Which of the following helps an atom become stable?
compounds
sharing valence electrons
protons
A full set of valence electrons
